Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: Revert "ALSA: firewire-lib: operate for period elapse event in process context" Commit 7ba5ca32fe6e ("ALSA: firewire-lib: operate for period elapse event in process context") removed the process context workqueue from amdtp_domain_stream_pcm_pointer() and update_pcm_pointers() to remove its overhead. With RME Fireface 800, this lead to a regression since Kernels 5.14.0, causing an AB/BA deadlock competition for the substream lock with eventual system freeze under ALSA operation: thread 0: * (lock A) acquire substream lock by snd_pcm_stream_lock_irq() in snd_pcm_status64() * (lock B) wait for tasklet to finish by calling tasklet_unlock_spin_wait() in tasklet_disable_in_atomic() in ohci_flush_iso_completions() of ohci.c thread 1: * (lock B) enter tasklet * (lock A) attempt to acquire substream lock, waiting for it to be released: snd_pcm_stream_lock_irqsave() in snd_pcm_period_elapsed() in update_pcm_pointers() in process_ctx_payloads() in process_rx_packets() of amdtp-stream.c ? tasklet_unlock_spin_wait </NMI> <TASK> ohci_flush_iso_completions firewire_ohci amdtp_domain_stream_pcm_pointer snd_firewire_lib snd_pcm_update_hw_ptr0 snd_pcm snd_pcm_status64 snd_pcm ? native_queued_spin_lock_slowpath </NMI> <IRQ> _raw_spin_lock_irqsave snd_pcm_period_elapsed snd_pcm process_rx_packets snd_firewire_lib irq_target_callback snd_firewire_lib handle_it_packet firewire_ohci context_tasklet firewire_ohci Restore the process context work queue to prevent deadlock AB/BA deadlock competition for ALSA substream lock of snd_pcm_stream_lock_irq() in snd_pcm_status64() and snd_pcm_stream_lock_irqsave() in snd_pcm_period_elapsed(). revert commit 7ba5ca32fe6e ("ALSA: firewire-lib: operate for period elapse event in process context") Replace inline description to prevent future deadlock.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7ba5ca32fe6e8d2e153fb5602997336517b34743 before 7c07220cf634002f93a87ca2252a32766850f2d1; affected 7ba5ca32fe6e8d2e153fb5602997336517b34743 before b239a37d68e8bc59f9516444da222841e3b13ba9; affected 7ba5ca32fe6e8d2e153fb5602997336517b34743 before f5043e69aeb2786f32e84132817a007a6430aa7d; affected 7ba5ca32fe6e8d2e153fb5602997336517b34743 before 36c255db5a25edd42d1aca48e38b8e95ee5fd9ef; affected 7ba5ca32fe6e8d2e153fb5602997336517b34743 before 3dab73ab925a51ab05543b491bf17463a48ca323 |
| Linux / Linux | affected 5.14; unaffected 0 before 5.14; unaffected 5.15.165 through 5.15.*; unaffected 6.1.104 through 6.1.*; unaffected 6.6.45 through 6.6.*; unaffected 6.10.4 through 6.10.*; unaffected 6.11 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/7c07220cf634002f93a87ca2252a32766850f2d1
- https://git.kernel.org/stable/c/b239a37d68e8bc59f9516444da222841e3b13ba9
- https://git.kernel.org/stable/c/f5043e69aeb2786f32e84132817a007a6430aa7d
- https://git.kernel.org/stable/c/36c255db5a25edd42d1aca48e38b8e95ee5fd9ef
- https://git.kernel.org/stable/c/3dab73ab925a51ab05543b491bf17463a48ca323
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.